The points are , , and .

Draw the coordinate plane.

Plot the points in the coordinate plane.

To indicate the point , go units along the -axis to above the origin.

To indicate the point , go units along the -axis and go right unit.

To indicate the point , go units along the -axis and go left units.

To indicate the point , go units along the -axis and go right units.

To indicate the point , go units along the -axis and go left units.

Graph:

Observe the graph:

The points , , , and are on the horizontal line that is three units above the -axis. 

Graph:

Observe the graph:

The points , , , and are on the horizontal line that is three units above the -axis.